Excavating and scraping apparatus



June 23, 1931. A. B. SHAW 1,811,030

EXCAVATING AND SCRAPING APPARATUS Filed Jun 3, 1929 2 Sheets-Sheet 1June 23, 1931. A. B. SHAW 1,811,030

EXCAVATING AND SCJRAPINGr APPARATUS Filed June 3, 1929 2 Sheets-Sheet 235 described and Patented June 23, 1931 UNITED STATES parent @FFKCEALLAN Renew, or DELAWARE, OHIO, ASSIGNOR. 'ro WESLEY o. SHAW, onDELAWARE, onro EXCAVATING AN D SCRAPING APPARATUS Application filed June3, 1929. Serial No. 367,863.

This invention relates to improvements in excavators or scrapers of thewheeled type and which is adapted for the connection with a motor unitsuch as a tractor or the like for drawing or pulling the same during thescraping operation and for transporting the earth which has been removedthereby.

' An object of the invention lies in the provision of a scraper having abucket which is arranged in a novel manner within the scraper framesothat the scraping edge of the bucket may engage with the ground to anyregulated depth desired and is maintained at such depth by the weight ofthe bucket.

Another object of the invention is to provide a hoisting apparatus upona tractor unit for elevating the bucket together with simple means fordumping or unloading the bucket.

A further object is to form the scoop or bucket with open ends, thefront end of which is to load the scraper and the rear end for unloadingthe same.

A still further object resides in the provision of a scraper which is ofstrong and durable construction and which is exceedingly efiective inaccomplishing the purpose for which it is designed.

With these and other objects in view which will appear as thedescription proceeds, the invention consists in the novel features ofconstruction, combinations of elements and arrangement of partshereinafter to be fully pointed out in the subjoined claims.

In the accompanying drawings:

Figure 1 is aperspective view of the scraper comprising the presentinvention showing the same connected to a tractor in an operativeposition,

Figure 2 is a vertical sectional view taken through the scraper unit,

Figure 3 is a detailed vertical sectional view of the adjusting meansfor the scoop,

Figure 4 is a detailed view showing the connection between the scraperand the rear of the tractor,

Figure 5 is a vertical longitudinal section to 'al view taken throughthe hoisting mechanism positioned upon the rear end of the tractor,

. Figure 6 is a transverse vertical sectional View taken on the line 66of Figure 5,

Figure 7 is a similar view taken on the line 77 of Figure 5,

Figure 8 is a perspective View friction'disk and bracket used inconnection with the hoisting apparatus,

Figure 9 is a fragmentary view taken on the line 99 of Figure 5 showingclutch engaging teeth of the hoisting drum.

Referring more particularly to the characters of reference on thedrawings, the numeral 1 designates in general a tractor which may be ofany well known type and includes the frame 2, the wheels 3 and thedrivers seat 4. The numeral 5 denotes the scraper connected to thetractor to be drawn thereby by a drawbar ti to which the front end ofthe scraper is connected by means of the usual pin and socket connection7, commonly employed in connection with implements of this character.The frame 8 of the scraper comprises a pair of side members 9 and 10between which the scoop is positioned and mounted for vertical movement.Extending crosswise of the rear end of the frame 8 and journaled withinthe members 9 and 10 is a shaft 11 upon which are freely mounted a pairof wheels 12 and 13 which serve to support the scraper.

Carried by the frame 8 and extending lon gitudinally thereof is a pairof upright inverted U-shaped supports 14 and 15 which have their lowerends connected to the frame 8 in any suitable manner and spaced at theirupper ends by means of a transversely positioned bar 16. Pivotally.connected to the rear legs of the supports 14 and 15 is the scoop 17,which has its front end provided with a' scraping edge 18. This scrapingedge is in the form of a bar positioned under the edge of the scoop andprovided with a pair ofbevelled cutting edges 19 and 20. The bar caseone of the edges should become dulled or damaged.

- which carry adjusting screws 25.

To further strengthen the scoop at its lower forward end, the bar hasits ends bent upward as indicated at 21 to conform to the shape of thescoop and which together with the channel members 22 and 23 carried bythe sides of the scoop, will serve to prevent spreading of the scoopwhen subjected to great stresses and strains.

In order to regulate the cutting depth of the scoop, the channel member22' has secured thereto at each side of the scoop brackets 24 Thesescrews engage the frame members 9 and 10 and is turned to increase ordecrease the inclination of the scoop which is normally supported sothat the cutting edge of the bar 18 will dig into the surface as thescoop is drawn forwardly by the pulling tractor. The side walls of thescoop are formed at their rear edges with recesses 26 so that the wallswill clear the shaft 17 when the scoop is in its extreme lower position.

Arranged to the front and rear of the scoop and to the open ends thereofare end walls 27 and 28, which are positioned transversely of thescraper frame and rigidlysecured to the uprights 14 and 15, the said endwalls serving to close the ends of the scoop 17 when the latter isloaded and elevated to a carrying position of the contents within thescoop.

In order to elevate the scoop within the frame 8, the intermediateportion of the channel 22 has mounted thereon a pulley 29 which is inalignment with a pair of pulleys 30 and 31 carried by the transversemember 16. Trained over these pulleys is a cable 32 which has one endthereof secured as at 33 to the channel member 22 and the other endleading to a hoisting unit 34 mounted on the rear portion of the tractorframe 2. The cable 32 passes rearwardly from the unit 34 over pulleys30, downwardly over the pulley 29 and upwardly over the pulley 3l andagain downwardly to its fastening upon the channel 22. By thisarrangement of the pulleys and Winding of the cable, the scoop. may beeas ly lifted with a full load from engagement with the ground. A

The hoisting unit 34 comprises a shaft 35 which is clamped withinbearing caps 36 mounted upon the upper surface of the frame 2. Rotatablymounted upon one end of the shaft is asprocket 37, which is in operatlvealignment with a sprocket 38 mounted upon the power take-ofi' shaft 39of the tractor. Trained over the pulleys 37 and 38 is an endless chain40 through which the power 1s transmitted to the hoisting unit 34. Alsomounted for rotation upon the shaft 35 is a drum 41 to which the end ofthe cable 32 is fastened and wound around to raise and lower the scoop.The drum is preferably cast in one piece and has formed at one endthereof a chamber 42 formed by the provision of the wall 43 and a collar44. Bolted or otherwise secured to the collar 44 is a plate 45 which ismounted for rotation with the drum and positioned between the enlargedend 46 formed upon the sleeve 47 and a stationary disk 48 carried by thebracket 49 which is rigidly carried by the tractor frame 2. Connected tothe sleeve 47 and mounted upon the bracket 49 is an operating lever 50,by which the sleeve 47 may be slid longitudinally of the shaft 35 sothat the enlargement 46 of the sleeve will engage with the wall 43 ofthe drum. This will cause the drum 41to slide towards the sprocket 37and engage the clutch faces 51 and 52 with one another thereby causingthe drum 41 to rotate in unison with the driving sprocket 37. Alsoformed with the drum 41 is an annular section 53,

which has its exterior surface formed with ratchet teeth 54. Engagingthe ratchet teeth 54 is a pivoted dog 55 which serves to hold the drumfrom rotating after the same has been disengaged from the sprocket 37.It will be noted by referring to Figure 5 that the teeth 54 are ofconsiderable width to permit the dog 55 to engage the said teeth eventhough the drum is slid longitudinally of the shaft 35. The dog 55 maybe formed with an extension 56 by which the same may be manuallyoperated so as to disengage the teeth 54 in order that the scoop may belowered to dump its load. To check the rapid rotation of the drum, thesame may be moved longitudinally of the shaft 35 through the action ofthe lever 50 and thesleeve 47, so that the plate 45 will frictionallyengage the disk 48. As the sleeve 47 is held from rotation by the keyand slot construction 57'it will be seen that the enlargement 46 willengage the inner face of the plate 45 so that a braking action is set upbetween the plate 45 and the two inner surfaces of the enlargement 46and the disk 48, respectively. Thiswill act as an eificient brake andpermit thescoop to be lowered slowly into engagement with the ground.One of the features of the scraper is that the scoop is dumped from itselevated position as shown in Figure 2, through the open rear endthereof in a direction rearwardly from the line of travel. As the rear.end wall is mounted stationary on the scraper frame and positionedinteriorly of the scoop 17, it will be seen that when the scraper scoop-is elevated so that the rear edge thereof moves away from the loweredge of the wall 28, a gap is provided through which the contents of thescoop will fall during the emptying operation.

It will be noted by referring to Figure 1 that the bottom wall of thescoop projects to the rear of the wall 28 when in a lowered position,permitting the rear end of the scoop to stay closed even though thescoop is ele vated so that the front end thereof is even with the loweredge of the wall 27 When in this position the scoop is closed at bothends and the contents thereof may thus be transported to its place ofdisposal without the danger of spilling the material.

Although the hoisting unit has been illus trated coupled up with thepower take-off on the left side of the tractor, it will be understoodthat by turning the same to a position end for end it may be adapted totractors having the power take-off on the right side thereof. As thehoisting mechanism is located to the rear of and adjacent to the driversseat the same can be readily operated to raise or lower the scoop forloading, transporting or dumping.

From the foregoing description taken in connection with the accompanyingdrawings, it will be seen that there is provided an excavating andscraping apparatus which is of a durable and strong construction,capable of withstanding hard usage and one which fulfills the objectsfor which it is designed.

It will be obvious that various changes in the size and shape of thedifferent parts, as well as modifications and alterations may be madewithin the scope of the appended claims.

What is claimed is:

1. In an excavating and scraping apparatus, a frame, an open ended scoophavin one of its ends pivoted to said frame, en

walls for said scoop stationarily carried by said frame, said end wallsnormally serving to close the ends of said scoop when in a carrying orloaded position, and means for tilting said scoop into an angularposition away from said end walls so that the scoop may be emptiedthrough one of its open ends.

2. In an excavating and scraping apparatus, a frame, a shaft at one endof said frame, wheels on said shaft, an open ended scoop pivoted to therear end of said frame, stationary end walls for said scoop positionedtransversely of said frame, the rear one of said end walls beingpositioned within the pivoted end of said scoop, whereby said rear wallserves to close the end of the scoop during the loading thereof andtogether with said front wall also serves to retain the scoop closedduring the transportation of the material within the scoop.

3. In an excavating and scraping apparatus, a frame, wheels forsupport-ing one end of said frame, an open ended scoop pivotally carriedby said frame, stationary end walls for said scoop carried by saidframe, and normally positioned substantially at right angles to thebottom of said scoop, means for limiting the downward movement of saidscoop, and means for raising the front end of said scoop so that thebottom thereof will take an angular position and move away from said endwalls so as to open the ends of said scoop.

4. In a scraper, a frame, means for supporting the frame spaced from theground,

an open ended scoop pivoted at one end to the rear portion of saidframe, a wall for the open pivoted end of said scoop stationarilycarried by said frame, and serving to close the end of the scoop duringthe loading thereof and means for raising the scoop at its front end sothat the bottom of the scoop becomes spaced from said end wall.

5. In a scraper, a frame, wheels for supporting said frame upon theground, an open ended scoop having one end pivoted to said frame, acutting edge on the other end of said scoop, means for adjusting thecutting depth of said edge, a stationary wall carried by the frame andpositioned within the pivoted end of said scoop and at substantiallyright angles thereto, whereby the pivoted end of the scoop remainsclosed during cutting or loading thereof but will become opened whensaid scoop is raised to an acute angle with respect to said wall.

In testimony whereof I affixrmy signature.

ALLAN B. SHAW.

